Comment 0 for bug 1711478

numactl currently FTBFS since arm does not define __NR_migrate_pages.

As described in the Debian bug comments [1] the function should just return -1 and set errno when __NR_migrate_pages is undefined. This prevents it from failing the build.

Failure from the buildlog [2]:

libtool: compile: gcc -DHAVE_CONFIG_H -I. -Wall -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -c syscall.c -fPIC -DPIC -o .libs/syscall.o
syscall.c:113:2: error: #error "Add syscalls for your architecture or update kernel headers"
 #error "Add syscalls for your architecture or update kernel headers"
  ^~~~~
syscall.c: In function ‘migrate_pages’:
syscall.c:209:17: error: ‘__NR_migrate_pages’ undeclared (first use in this function); did you mean ‘numa_migrate_pages’?
  return syscall(__NR_migrate_pages, pid, maxnode, frommask, tomask);
                 ^~~~~~~~~~~~~~~~~~
                 numa_migrate_pages
syscall.c:209:17: note: each undeclared identifier is reported only once for each function it appears in

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=796802#15
[2] https://launchpadlibrarian.net/332625047/buildlog_ubuntu-artful-armhf.numactl_2.0.11-2.1_BUILDING.txt.gz